This week, Biohaven announced that it received Fast Track designation from the U.S. Food and Drug Administration (FDA) for taldefgrobep alfa, a novel anti-myostatin adnectin, for the treatment of spinal muscular atrophy (SMA). Fast Track designation enables important new drugs to reach patients earlier by facilitating more frequent communications with the FDA and expeditious review of a drug which treats a serious condition and fills an unmet medical need. Biohaven previously received orphan drug designation from the FDA for taldefgrobep in the treatment of SMA.
Taldefgrobep has the potential to be a novel therapy to be used in combination with disease modifying therapies to enhance muscle function by blocking myostatin activity. Taldefgrobep’s novelty in a field of myostatin inhibitors is based on its mechanism of action. It binds to myostatin to both lower overall myostatin levels and also function as a receptor antagonist, thereby blocking myostatin signaling in skeletal muscles.
Biohaven is currently enrolling a Phase 3 clinical trial of taldefgrobep in SMA: A Study to Evaluate the Efficacy and Safety of Taldefgrobep Alfa in Participants with Spinal Muscular Atrophy (RESILIENT).
About Taldefgrobep alfa
Taldefgrobep alfa (also known as BHV2000) is a modified adnectin designed to specifically bind to myostatin (GDF-8). Taldefgrobep is a fully human anti-myostatin recombinant protein that lowers free myostatin and acts as an Activin 2b receptor antagonist with the myostatin-taldefgrobep complex. Adnectins are an established proprietary protein therapeutic class based on human fibronectin, an extracellular protein that is naturally abundant in human serum.
Myostatin is protein expressed in skeletal muscle. This protein limits muscle growth, ensuring that muscles do not grow too large. By lowering myostatin levels in skeletal muscle, Taldefgrobep alfa seeks to enhance muscle function.